Table 7 Un-compensated solution resistance, admittance, charge transfer resistance, double layer capacitance and thickness of passive film for rebar exposed in pore solution mixed with different additives.

From: Kinetics and mechanism of gallic acid as an ecofriendly corrosion inhibitor for steel rebars in mortar

Test solution

Electrochemical parameters

IE

χ2

x10−4

R0

(Ohm .cm2)

Y0

(S.sα / cm2)

x10−6

α

Rct

(KOhm .cm2)

Cdl,µF cm−2

Thickness, nm

%

2.1

a. Pore solution + 1 M NaCl

4.9

59.5

0.78

11.80

6.02

3.82

-

9.6

b. a + 0.125%GA

4.67

45.3

0.81

74.38

6.25

6.37

84.1

2.1

c. b + 0.10% CaCl2

4.8

39.4

0.80

425.5

4.62

8.62

97.22

6.3

d. b + 0.20% CaCl2

5.2

28.2

0.81

560.1

3.52

11.32

97.9

4.2

e. b + 0.25%CaCl2

5.9

25.1

0.80

429.5

2.75

14.48

97.25

4.1

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